Search results for "FOS"
showing 10 items of 15075 documents
Are fossils enough? Palaeontological tourism based on local dinosaur discoveries
2020
Fossils of dinosaurs and other tetrapods have long aroused interest of scientists and the public opinion alike. Every finding of a new (especially large) species receives coverage in national and international media, and thus, local fossil discoveries might constitute a good basis for local tourism development. The paper aims to examine whether fossiliferous sites on their own may be enough for the development of palaeontological tourism to occur, or do they require the support of additional amusement infrastructure. For this purpose, the interest in chosen localities was analysed using Google and Wikipedia searches, and was further discussed against a survey on dinoparks and their elements…
It was full of empty : lexical errors in written compositions of Finnish pupils
2000
Genitori affidatari e Leaving Care: il ruolo delle famiglie affidatarie nell’uscita da casa del giovane adulto
2022
Leaving care refers to those subjects who, upon completion of the major age, are going to start their adult life but supported by their paths, on the basis of a provision of the judicial authority. These paths, aimed at the support of the phase of exit of care leavers from their reception system (foster cares, for minors and / or kinship families), involve foster families too.
Wspomaganie procesu organizacji uczenia się dziecka w okresie zdalnej edukacji w doświadczeniu rodziców zastępczych
2022
Tło badań: Rodzicielstwo zastępcze jest szczególnym rodzajem rodzicielstwa, które wymaga zaangażowania, poświęcenia, cierpliwości oraz odpowiednich umiejętności. Zdalne nauczanie w okresie Covid-19 było nową sytuacją zadaniową dla uczniów i ich opiekunów. Artykuł jest pewnym zapisem podmiotowej świadomości czasu zarazy lat 2020–2022. Cel badań: Poznanie doświadczeń rodziców zastępczych w sytuacji wyznaczonych im przez system edukacyjny zachowań ułatwiających funkcjonowanie dzieci w czasie nauki zdalnej. Metoda badawcza: Artykuł prezentuje rezultaty pilotażowych badań metodą wywiadu częściowo ustrukturyzowanego, przeprowadzonych na grupie rodziców zastępczych w marcu 2022 roku. Osiągnięte wy…
Impianto perfezionato per il trattamento di acque reflue
2019
Negli ultimi anni, a causa dell’incremento dei costi di smaltimento dei fanghi prodotti nel corso dei processi depurativi basati su metodi biologici, si va diffondendo sempre più la tendenza e la necessità di ridurne la produzione direttamente alla fonte, ovvero nel corso dello stesso processo che li genera. Diversi metodi sono proposti in letteratura e molti di essi sono già coperti da brevetto (OSA®, Cannibal®, Biminnex®), applicati ai processi biologici a fanghi attivi convenzionali (CAS). Il limite di questi processi è che una riduzione molto spinta della produzione di fango di supero, ottenuta sottoponendo la biomassa a stress biologico, comporta significativi peggioramenti della quali…
Persistence in complex systems
2022
Persistence is an important characteristic of many complex systems in nature, related to how long the system remains at a certain state before changing to a different one. The study of complex systems' persistence involves different definitions and uses different techniques, depending on whether short-term or long-term persistence is considered. In this paper we discuss the most important definitions, concepts, methods, literature and latest results on persistence in complex systems. Firstly, the most used definitions of persistence in short-term and long-term cases are presented. The most relevant methods to characterize persistence are then discussed in both cases. A complete literature r…
On the discreet spectrum of fractional quantum hydrogen atom in two dimensions
2019
We consider a fractional generalization of two-dimensional (2D) quantum-mechanical Kepler problem corresponding to 2D hydrogen atom. Our main finding is that the solution for discreet spectrum exists only for $\mu>1$ (more specifically $1 < \mu \leq 2$, where $\mu=2$ corresponds to "ordinary" 2D hydrogenic problem), where $\mu$ is the L\'evy index. We show also that in fractional 2D hydrogen atom, the orbital momentum degeneracy is lifted so that its energy starts to depend not only on principal quantum number $n$ but also on orbital $m$. To solve the spectral problem, we pass to the momentum representation, where we apply the variational method. This permits to obtain approximate analytica…
Inverse problems for a fractional conductivity equation
2020
This paper shows global uniqueness in two inverse problems for a fractional conductivity equation: an unknown conductivity in a bounded domain is uniquely determined by measurements of solutions taken in arbitrary open, possibly disjoint subsets of the exterior. Both the cases of infinitely many measurements and a single measurement are addressed. The results are based on a reduction from the fractional conductivity equation to the fractional Schr\"odinger equation, and as such represent extensions of previous works. Moreover, a simple application is shown in which the fractional conductivity equation is put into relation with a long jump random walk with weights.
Fractional Maximal Functions in Metric Measure Spaces
2013
Abstract We study the mapping properties of fractional maximal operators in Sobolev and Campanato spaces in metric measure spaces. We show that, under certain restrictions on the underlying metric measure space, fractional maximal operators improve the Sobolev regularity of functions and map functions in Campanato spaces to Hölder continuous functions. We also give an example of a space where fractional maximal function of a Lipschitz function fails to be continuous.
On some properties of g-frames and g-coherent states
2010
After a short review of some basic facts on g-frames, we analyze in details the so-called (alternate) dual g-frames. We end the paper by introducing what we call {\em g-coherent states} and studying their properties.